/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Solvers/MeshSmoothing.h
The result is returned in the PositionArray
namespace UE { namespace MeshDeformation { void UE::MeshDeformation::ComputeSmoothing_BiHarmonic ( const [ELaplacianWeightScheme](API\Plugins\DynamicMesh\Solvers\ELaplacianWeightScheme) WeightingScheme, const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) & OriginalMesh, const double Speed, const double Weight, const int32 NumIterations, [TArray](API\Runtime\Core\Containers\TArray)< FVector3d > & PositionArray ) } }